Centrifugal casting.



D. 8. DE LAVAUD. CENTRIFUGAL CASTING. APPLICATION FILED MAR. 29. 1918.

W ATTOR YS.

Patented Feb. 4, 1919.

0131! TRIFUGAL GEJSTING.

Specification of Letters Patent.

Patented Feb. 1, 1919.

Application filed Morel: 29, 1918. Serial 15$ 0. 225,359.

1 '0 all whom it may 0071.66'172.

Be it known that I, Diiii'rui SENSAUD on LAVAUD, a citizen of the United States of Brazil, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful linprovemcnts in Centrifugal Castings, of which the following; is a specification.

This invention relates to improvements in centrifugal casting, and more particularly aims to provide improvemenlrs in rapid-production processes and machines for casting annular members, as piston-rings, in groups.

The present invention has $01 3 incipnl object the provision oi: a no vol 01.

in of mulsiple-cast-ing mold for casting; the articles in groups, and a novel process of :issei'nbling this mold when forming the same of :11 plurality of component parts, a great many of which are preferably duplicates. The invem tion Sl10\ s one type of such mold which may advantageously be employed in a centrifugal machine according to the. invention of my copending application, Serial No. 236,009 filed May 22, 1918. The novel form of mold of the present invention is here specifically claimed, but more broadly claimed in such copending application, a division of the pros one application.

The "invention will be more cleanv y understood from the following description, when taken in connection with the accompanying drawings, illustrating a preferred embodiment of the invention.

In these drawings,

Figure 1 is a side elevation of the multiplecasting mold justv after assembly, showing, also, an apparatus which may be employed to "facilitate carrying oui; the process; and

Fig. 2 is a transverse seclyion taken on the line 22 of 1, with certain his parts removed.

The mold hers shown compri es duplicate end-rings or end-p boss 3, scricsof inlermodia'ts al'c 'i lately ar anged thicker mold rings 4 herei'asitci? rei ed to as the periphery molds, since they are to form the outer peripheries the cast iclos and thinner mold rings hereinafter referred to as side molds, ince they are to form the sides of the. our; articles. Except for the pi'ovision on th d-olstes 3, of the al zernatel arranged oil ension f} and l", ithe end-rings 3 and the u old-rings :4- snd :"i are of a common external diameter. The ore tensions 6 are provided with openings, open-- pair of and mouthed at their outer ends, and the extensions T are provided with openings of circular cross-section as shown. These openings in the extensions 7 may be employed for mounting the mold when assembled on a rotor as described in the, copending application aboveidenliiiied.

The openings in the extensions 6 are provided "for the insertion therein 01'' the tielengths of a plurality of longitudinal tie-elements or boll-s 8 having terminal enlargements 9' and 10. These, terminal enlargements in the present case are constituted by the bolt-heads and by the nuts illustrated. In Oll'lfil lo permit lhe stack of end-plates and mold-rings to be assembled readily and easily, in preparation for the addition-of the extensions 6, and yet to permit these tie elements subsequently to hold. all partsoff the mold interlocked as one unit, the as semhlmg apparatus further comprises a fixed abutment i l, and in line therewith a movable resser-block This prcsser-block is supported as one end of a screw 16, threaded through a. fixed sleeve 17, and carrying at its other end a hand wheel 18. Preferably the presser-block 15 is connected to the adjacentend of the screw 16 in a suitable inan- BOP (not shown) so that the, screw may be i-otzu'cd relative to 'l'he presser-block, thereby to permit spiral adjustment of the screw to advance hc pre or hlock axially of the mold. The presser-hiocl: is thus advanced suliicienlly to compress the steel: of endplates and inold-rings to a slightly greater extent l'han the exienl relied on to hold the eiul-plstes and mold-rings connected when the fully assembled mold is released and removed from the. assembly apparatus. Such l compref'on of the stock permits the tieel-emenlzs to he sol. in place in the openings in the e cnsions 6 very quickly and easily.

in will. thus be. seen that the process of the present invention comprises the stacking riphery and side molds, subjecting themolds eace-o of a plurality of alternately arranged pcto axial pressure to reduce the length of the stack to less than the normal length of the stack, then securing the molds together to be held in the stack, by mutual face-pressure and then, before releasing said axial pressure, tying the stack of molds together by means of end-plates or end-rings and separable longitudinal tie-elements coupling the end-plates.

I claim:

1. A multiple-casting mold mountable o and: demountable from a supporting rotor of a centrifu al casting machine, for casting simultaneous y a group of disconnected parthen thus engaging the tie-elements, and then releasing said pressure.

3. The art of assembling a plurality of? v mold-rings in axial alinement between two end-rings, by means of separable longitudinal tie-elements adapted to be engaged with coacting elements carried by the end-.

rings, thereby to provide a portable unitary multiple-casting mold, which consists in assembling between the end-rings a plurality of side-by-side arranged mold-rings, by supporting and positioning'two corresponding points on the outer periphery of each ring and below the center of the ring so that two series of corresponding points on all the allelly disposed annular articles, said mold comprlsing a plurality of'concentric valternately arranged periphery mold-rings and side-surface'mold rings, and securing means comprising two end-rings and tie-elements running longitudinally of the mold so pro- I portioned and arranged as to cause adjacent rings are alined paral y, subjecting the rings to axial pressure to reduce the length of the column to less than the normal length of the column when the tie-elements are. engaged with said coasting elements, then thus engaging the tie-elements, and then releasing said pressure.

l. A mold as described in claim 1, wherein each tie-element is a rod-like member having enlargement-s at opposite ends, the two enlarge-ments'being locked into predetermined spaced relation longitudinally of the tieelements to assemble the mold.

5. A mold as described in claim 4, wherein one of the enlargements on each tie-element is adjustable relative to the other to vary said spaced relation between the two enlargements on that tie-element to adapt the tie-element for utilisation in a multiplecastmg In 1d comprising a predetermined ling between the end-rings a plurality of.

side-by-side arranged mold-rings, subjecting the rings to axial pressure to reduce the length of the column to less than. the normal length of the column when the tie-elements are engaged with said coacting elements,

number of mold-r1ngs.

New York and State of New York this 28 day of March, A, 1918.

DIMITRI SENSAUD 15E LAVAUD.

Signed at New York, in the county of i 

